Counting Atoms

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element.

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together.

Front

What does the subscript in a chemical formula represent?

Back

The subscript indicates the number of atoms of the element in the molecule.

Front

How do you find the total number of atoms in a compound?

Back

Add up all the atoms represented in the chemical formula.

Front

What is the chemical formula for water?

Back

H₂O, which means it has 2 hydrogen atoms and 1 oxygen atom.

Front

What is the chemical formula for sulfuric acid?

Back

H₂SO₄, which means it has 2 hydrogen, 1 sulfur, and 4 oxygen atoms.

Front

How many atoms are in the compound H₂C₃O₄N₅?

Back

There are 14 total atoms.

Front

What is the formula for three hydrogen, one sulfur, and four oxygen?

Back

H₃SO₄.

Front

How many chlorine atoms are in MgCl₂?

Back

There are 2 chlorine atoms.

Front

How many oxygen atoms are in H₂SO₄?

Back

There are 4 oxygen atoms.